Copper base Brazing Filler Metal
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copper brazing filler metal used for copper brazing
| Classification | Composition (%) | Brazing temperature (°C) | Welding temperature ( °C) | Character and application | |||||
| >Cu | Zn | Ni | Mn | Co | Solidus | Liquidus | |||
| BCu | 99.9 | 1083 | 1100-1150 | Good impact-toughness ,low intension | |||||
| BCuNiMn | 86 | 2 | 12 | 970 | 990 | 1000-1050 | Good toughness, can stand high temperature. | ||
| BCuCoMn | 87 | 10 | 3 | 980 | 1030 | 1050-1100 | Good plasticity , good resistance, | ||
| Cu92FeMn | others | 10 | 3 | 950 | 1020 | 1050-1100 | Good plasticity, suitable for furnace welding. | ||
| Cu85Mn | 85 | 15 | 920 | 960 | 980-1030 | Good impact-toughness, good intension | |||
| H62 | 62 | 38 | 900 | 905 | 910-950 | Moderate welding temperature and intension. | |||
| BCu54ZnMn | 54 | 20 | 0.3 | 25 | 0.7 | 830 | 860 | 900-930 | Lower welding temperature and low mildness. |
| BCu58ZnMn | 58 | 38 | 4 | 880 | 909 | 940-960 | Very popular , and low intension. | ||
| BCu58ZnMnCo | 58 | 38 | 2 | 890 | 925 | 940-960 | High joint-intension(L801) | ||
| BCu48ZnNi | 48 | Others | 10 | 921 | 935 | 938-982 | High joint-intension, can stand high temperature. | ||
| CT852 | 56 | 38 | 0.6 | 4 | 865 | 895 | 900-930 | Good flow-extend, good wettability. | |
| L841/L842 | 51 | 42 | 1 | 4 | 865 | 880 | 880-900 | ||
| Product | Composition | Critical point | Brazing temperature °C | Application | Character | ||||
| Ag | Cu | P | Sn | Solidus | Liquidus | ||||
| BCu93P | Others | 6.8/7.5 | 710 | 800 | 735/815 | Copper-copper joint in icebox and air-condition | Good liquidity, suitable for welding the middle gap joint. | ||
| BCu92P | Others | 7.5/8.5 | 710 | 780 | 720/780 | Good liquidity, suitable for welding small gap joint, but the toughness is little bad. | |||
